Chusetts



(170 Model.) .7

A. O. SHUTTLEWORTH. ELEGTRIGAL WARP STOP MOTION FOR LOOMS. No. 577,077.Pan;entead Peb. 16. 1897.

UNITED STATES PATENT OFFICE.

ALPHEUS O. SHUTTLEWVORTH, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TOGEORGE DRAPER & SONS, OF HOPEDALE, MASSA- CHUSETTS.

ELECTRICAL WARP STOP-MOTION FOR LOOMS.

SPECIFICATION formingpart of Letters Patent No. 577,077, dated February16, 1897.

Application filed April 30, 1894.

To all whom, it may concern.-

Be it known that I, ALPHEUS O. SHUTTLE- WORTH, a citizen of the UnitedStates, residing at Philadelphia, in the county of Philadelphia andState of Pennsylvania,have invented certain new and useful Improvementsin Electrical Warp Stop-Motions for Looms; and I do declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same, reference being had to the accompanying drawing,and to the letters of reference marked thereon, which forms a part ofthis specification.

My invention has for its object to provide means for stopping a loomwhen any breakage or disarrangement of the threads occurs such as wouldresult in an imperfection in the work if the weaving continued. Themechanism for stopping the loom in event of accident to the threads iscommonly called the stop-motion and the class to which my inventionbelongs is known as a warp stopmotion.

The particular type of stop-motion to which my invention relates is thatin which the warp-threads, acting in connection with the heddles, serveto actuate the stopping mechanism proper whenever any one of thewarpthreads breaks or becomes slackened to such an extent that it wouldrender the weave imperfect if the work were continued without mending ortightening such thread.

In carrying my invention into effect I have constructed the stoppingmechanism in such a way that I am able to use electrical force as ameans for operating the shipper-lever and stopping the loom, and I haveproduced an electrical warp stop-motion for looms which is very rapidand certain in its operation, and which can be so disposed relative tothe other working parts of the loom as to occupy comparatively littlespace, and thus leave the weaving mechanism unobstructed for theattention of the operator and free to perform its functions until theabnormal conditions of the weaving mechanism threatens the character ofthe work produced.

In the drawing which accompanies and Serial No. 509,447. (No model.)

forms a part of this specification I have shown a loom embodying myinvention in perspective, parts of the loom being broken away for thesake of clearness.

Referring to the drawing by letter, A denotes a loom-frame of ordinaryconstruction, having the heddle-frames aand heddle-frameoperating shafta, connected by the straps a to the heddle-frames a, and theretractingsprings a secured to the bottom of said frames, as usual inthis type of loom. In the heddle-frames a (only one beingshown in thedrawing) are mounted the heddle-shafts b, on which the heddles b arestrung in the usual manner,the loops b at the ends,through which theshafts I) pass, being longer than the width of the shafts in order thatthe heddles b may have alimited vertical movement.

The heddle-shafts b are connected with the horizontal bars of theheddle-frame a by means of the wires 12 this connection being for thepurpose of completing the electrical circuit,as will be explainedhereinafter. Said .heddle-shafts b, it will be understood, areelectrically connected through the heddleframe (1,, although they may beconnected in any other suitable manner.

Suspended from a bracket 0 are two de pending arms 0, to which aresecured two horizontal detector-plates D D. Said plates D D, which Icall detector-plates for the reason'that they play an important part inthe detection of broken or sagging warp-threads, are adj ustably securedto said depending arms 0 by means of the bolts 0 in order that they maybe adjusted at dilferent angles, according to the angle of the line ofthe shed, and they run the entire length of the loomframe, so as toextend through the entire field of heddle-frames. Said plates D D liebetween the heddle-shafts b and the'horizontal bars of the heddle-framesa and are highly magnetized in a manner and for purposes which willhereinafter appear. These plates D D are, however, out of electricalcontact 9 with the heddles, heddle-frames, and other working parts ofthe loom, the slots d, which embrace the connecting-wires b ,-beinginsulated on their sides, as shown. The depending arms 0, which supportplates D D, are

wound, as shown at 0, so as to form electromagnets, and they areconnected with a source of electrical energy E through the connection 0Through said connections 0 the current normally passes from the sourceof electrical energy E to a binding-post c on the frame, thence to themagnets c and detector-plates D D, and then through connection 0 passesto the shipper-lever F and through spring a to the binding-post c. Saidbinding-post c is connected with the source of electrical energy E byconnection 0 thus completing the electrical circuit.

The shipper-lever F is a springlever, as shown, and is normally lockedin position to keep the circuitabove described unbroken by means of thelocking-lever f, which is pivoted to a lug on the loom-frame, the hookedend f of which engages the shipper-lever F. The locking-leverf isarranged Within the field of attraction of an electromagnet G, which isnormally inactive, but which is in electrical circuit with the heddlesI) through the connection g and wires 11 which connect the heddle-shaftsZ) with the heddle-frame a, as hereinbefore described. Said magnet G isin circuit also with the source of electrical energy E through thebinding-post c by means of the connection From the foregoing it will beseen that the heddles are norm ally held out of con tact with themagnetized detector-plates D D during the shed by the tautness of thewarp-threads, and the electrical circuit is through bindingpost 0connections 0 magnets 0, plates D D, connections 0 shipper-lever F, andspring 0 to binding-post 0 If, however, a warpthread should break orbecome so slack as to endanger the quality of the weave, the particularheddle-wire on which the pressure of the warp-thread is relaxed will beattracted by one of the plates D D, according to the position of theheddle-frame at the time, and short circuiting through the heddleshafts,wires b connection g, electromagnet G, and connections 9 to the sourceof electrical energy E will follow. The electromagnet G being in thecircuit last traced will be energized and will attract the free end ofthe pivoted locking-lever f, thus releasing the shipper-lever E, whichwill spring to the position indicated in dotted lines in the drawing andactuate the stopping mechanism, this latter mechanism not beingillustrated or described, as it forms no part of my invention and may beany suitable type of the numerous and well-known forms. hen the break inthe thread has been repaired, the shipper-lever may be thrown to itsnormal position, and the electrical current will resume its normalcircuit.

I claim- 1. In an electric Warp stop motion for looms, the combinationwith the heddleframes, of a series of heddles mounted on their shafts soas to have a limitedindependent vertical movement, a magnet so placedrelative to said heddles as to be in close proximity to the ends of saidheddles at the termination of each shed, stopping m eehanism, andelectrical connections between said magnet and stopping mechanism toactuate said mechanism and stop the loom when a heddle comes in contactwith said magnet.

2. In an electric warp stop motion for looms, the combination with theheddleframes, of a series of heddles mounted on their shafts so as tohave a limited independent movement vertically, a magnet placed in closeproximity to the ends of said heddles and adjustable to the angle of theline of the shed, stopping mechanism, and electrical con; nectionsbetween said magnet and stopping mechanism to actuate said mechanism andstop the loom when a heddle comes in contact with said magnet.

In an electric warp stop motion for looms, the combination with theheddleframes, of a series of heddles mounted on their shafts so as tohave a limited independent vertical movement, magnetic plates adjustably mounted relative to said heddles so as to be in closeproximityto the ends of said heddles at the termination of the shed, asource of electrical energy with which said magnetic plates are incircuit and by which they are constantly excited, stopping mechan ism,and electrical connections between said stopping mechanism and saidmagnetic plates whereby when contact is made by a heddle with either ofsaid magnetic plates the stop ping mechanism is actuated and the loom isbrought to a state of rest.

4. In an electric warp stop motion for looms, the combination with aseries of bed die frames, of heddles mounted on their shafts so as tohave a limited independent vertical movement, slotted magnetic platesextending through the entire field of heddleframes and arranged so as tolie in close proximity to the ends of the heddles at the close of theshed, stopping mechanismfor the loom, and electrical connections betweensaid magnetic plates and stopping mechanism whereby the latter isactuated and the loom is brought to a state of rest when any one of theheddles contacts with either of said magnetic plates and completes thecircuit.

5. In an electric warp stop motion for looms, the combination with theheddleframes at having the heddle-shafts b, of the heddles I) havinglimited vertical play on said shafts, the magnetic plates D, D,extending through the entire field of heddle-frames, stopping mechanism,a source of electrical energy from which a current normally passesthrough the loom-frame and magnetic plates D, D, and electricalconnections between the heddles and the stopping mechanism whereby whena heddle contacts with either of said plates D, D, short-circuitingensues, the stopping mechanism is actuated, and the loom is brought to astate 01": rest.

6. In an electric warp stop -motion for the stopping mechanism isactuated looms, the combination with the heddleframes at having theheddle-shafts b, of the heddles b havinglimited vertical play on saidshafts, the connections b the slotted mag-- netic plates D, D, extendingthrough the entire field of heddle-frames and embracing connections bstopping mechanism, a source of electrical energy from which a currentnormally passes through the loom-frame and magnetic plates D, D, andelectrical connections between the heddles and the stopping mechanism,whereby when aheddle contacts with either of said plates D, D,short-circuiting ensues, the stopping mechanism is actuated and the loomis brought to a state of rest.

7. In an electric warp stop motion for looms, the combination with aseries of heddleirames a having the heddle-shafts b, of the heddles I)having limited vertical movement on said shafts, the connections b themagnetic plates D, D, extending through the entire field ofheddle-frames and provided a with slots d which embrace said connectionsb and are insulated therefrom stopping mechanism, a Source of electricalenergy from which a current normally passes through the loom-frame andmagnetic plates D, D, and electrical connections between the heddles andthe stopping mechanism, whereby when a heddle contacts with either ofsaid plates D, D, short-circuiting ensues, the stopping mechanism isactuated, and the loom is brought to a state of rest.

8. In an electric warp stop motion for looms, the combination with theheddleframes, of a series of heddles mounted on the heddle-shafts so asto have a limited independent vertical movement, two magnetic plateswhich are constantly excited While the loom is in operation extendingthrough the entire field of heddle-frames and so positioned as that theylie in close proximity to the ends of the heddles at the termination ofthe shed, a source of electrical energy with which said magnetic platesare in circuit, stopping mechanism in circuit with said plates,actuating means forsaid stopping mechanism which is normally out ofcircuit, and electrical connection between said actuated means and saidheddles whereby when any one of said heddles contacts with either ofsaid magnetic plates short-circuiting ensues, and the loom is brought toa state of rest.

9. In an electric warp stop motion for looms, the combination with theheddleframes, of a series of heddles mounted on the heddle-shafts so asto have a limited independent vertical movement, two magnetic plates,which are constantly excited while the loom is in operation, extendingthrough the entire field of heddle-frames and adjustable to the angle ofthe line of the shed,said plates being so positioned as that they lie inclose proximity to the ends of the heddles at the termination of theshed, asource of electrical energy with which said magnetic plates arein circuit, stopping mechanism in circuit with said plates, actuatingmeans for said stopping mechanism which is normally out of circuit, andelectrical connections between said actuating means and said heddleswhereby when any one of said heddles contacts with either of saidmagnetic plates short-circuiting ensues, the stopping mechanism isactuated and the loom is brought to a state of rest.

10. In an electric warp stop -motion for looms, the combination with theheddleframes, of a series of heddles carried by the heddle-shafts andhaving a limited vertical movement thereon, electromagnets suspendedfrom the loom-frame, magnetic plates secured to said electromagnets andexcited thereby extending through the entire field of heddle-frames, inclose proximity to the ends of said heddles so as that said plates willattract and hold any one of the heddles on which tension is relaxed,and-means 'for energizing said electromagnets.

11. In an electric warp stop-motion for looms, the combination with theheddleframes, of a series of heddles carried by the heddle-shafts andhaving a limited vertical movement thereon, electromagnets suspendedfrom the loom-frame, magnetic plates adjustably secured to saidelectromagnets and excited thereby, said plates extending through theentire field of heddle-f ram es in close proximity to the ends of saidheddles so as that said plates will attract and hold any heddle on whichtension is relaxed, and means for energizing said electromagnets.

12. In an electric warp stop-motion for looms, the combination with aseries of heddle-frames, provided with heddle-shafts, of heddles mountedon said shafts so as to have a limited independent vertical movement,two magnetic plates extending through the entire field of heddle-framesbut normally out of contact with said frames and heddles,

a source of electrical energy with which said a magnetic plates are incircuit, a spring shipper-lever in circuit with said plates, means forlocking said shipper-lever, electrical connections between said heddlesand the source of electrical energy, and a normally inactiveelectromagnet to control said locking means for the shipper-lever incircuit with said heddles, whereby when any one of the heddles contactswith either of said magnetic plates short-circuiting through saidelectromagnet ensues, the spring shipper-lever is released and the loomstopped.

13. In an electric warp stop -motion for looms, the combination with aseries of heddle-frames provided with heddle-shafts, of heddles mountedon said shafts so as to have a limited independent vertical movement,two magnetic plates extending through the entire field of heddle-framesbut normally out of contact with said frames and heddles, a source ofelectrical energy with which said magnetic plates are in circuit, aspring shipper-lever in circuit with said plates, a pivoted 10ckin=1ever en 'a in an arm on said shi the shi )er-lever released and the100111 is IO a a O v per-lever, electrical connections between saidstopped.

heddles and the source of electrical energy, In testimony whereof Iaffix my signature and a normally inactive eleetroniagnet to coninpresence of two Witnesses.

trol said pivoted locking-lever in eireuitwith r said heddles, wherebywhen any one of said ALPIIEUS SHUTTLEWVORFH' heddles contacts witheither of said magnetic \Vitnesses:

plates, short-circuiting through said electro- LEWIS F. BRoUs magnetensues, the looking-lever is lifted, WM. B. HILT.

